Corresponding-states correlations for estimating partial molar volumes of nonelectrolytes at infinite dilution in water over extended temperature and pressure ranges

A. V. Plyasunov, Everett Shock, J. P. O'Connell

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Analysis has been made of a large volume of data to obtain the partial molar volumes of aqueous solutes at infinite dilution for temperatures up to 700 K and pressures up to 50 MPa. Values of V2 are expressed in terms of the infinite dilution water-solute direct correlation function integral (DCFI) at the conditions of interest reduced by the solute's DCFI at 298.15 K, 0.1 MPa. Empirical equations have been found for the temperature-density dependence of these reduced DCFIs for solute classes of: simple fluids, nonpolar compounds, aromatic compounds, monohydric alcohols, monocarboxylic acids, nitriles, amides, and other organic solutes. A reliable, but less accurate generalization, based on pure water DCFI, has also been developed for the reduced DCFI for solute classes of: simple fluids, nonpolar compounds, polar substances, and compounds containing chemically bonded water. At high densities, the reduced DCFI for all solutes is the same as that for water, which is consistent with the behavior of hard-sphere mixtures.

Original languageEnglish (US)
Pages (from-to)18-31
Number of pages14
JournalFluid Phase Equilibria
Volume247
Issue number1-2
DOIs
StatePublished - Sep 15 2006

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Keywords

  • Aqueous nonelectrolytes
  • Corresponding-states correlations
  • Dilute solution
  • High pressures
  • High temperatures
  • Partial molar volume

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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